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As well as being a stub, this page is rather repetitive and a bit confused. I am writing a replacement. Ian ( talk) 13:16, 20 January 2013 (UTC) reply

I never got round to the replacement, but this still stands out:

In some instances, leaves can be used as a source of pigment by rubbing them onto the surface of the plate.

This isn't a particular characteristic of collagraph and doesn't really belong here. Ian ( talk) 10:28, 18 August 2015 (UTC) reply

This is one of those articles that would really benefit from a few illustrations